|
| Intervention | Online group or one-to-one | Contacts | Contact with research staff |
|
| Ballantyne et al. [30] | Online group | Family and friends, new people | Weekly visits first, then fewer; phone calls at most 1 h/week |
| Blažun et al. [32] | Online group | Family and friends, new people | Training once a week; 4 h in Finland and 3 h in Slovenia |
| Cattan et al. [43] | One-to-one | Volunteers (predefined) | Variable number of weekly calls |
| Cotten et al. [34] | Online group | Family and friends, new people | Eight-week training (data from first 2 weeks) |
| Dodge et al. [44] | One-to-one | Predefined (trained interviewers) | Video chat 30–35 min/day; 5 days/week |
| Fokkema and Knipscheer [41] | Online group | Family and friends, new people, other participants, acquaintances | 5 × 2 h lessons; visits every 2–3 weeks |
| Garattini et al. [45] | Online group | Family and friends, other participants | 4 × 1 h visits; messages via app; weekly calls (extra calls for technical issues) |
| Larsson et al. [39] | Online group | Family and friends, new people, and other participants | Individual meeting offered weekly, group meeting every 2 weeks |
| Machesney et al. [40] | One-to-one | Predefined (trained helpers) | Visits and phone calls, available 24/7 |
| Széman et al. [41] | Online group | Family and friends, new people, and acquaintances | 1 × 1.5 h lesson; 1 h visits twice a week |
| White et al. [42] | Online group | Family and friends, new people | 3 × 2 h lessons, three 1 h lessons; trainer visits 2 h/week |
| Baez et al. [46] | Online group | Other participants, predefined (coach) | 1.5 h training model before baseline; support messages/calls |
| Czaja et al. [35] | Online group | Family and friends, other participants | Initial setup, 3x check visits, calls at week 1, months 3 and 9 |
| Banbury et al. [47] | Online group | Family and friends, predefined (facilitator), and other participants | Minimal training |
| Barbosa et al. [48] | One-to-one | Family and friends, acquaintances | Individual training at before deployment; weekly support visits |
| Chiu and Wu [33] | Online group | Family and friends | 90-min ICT training sessions weekly for 12 weeks |
| Gutierrez et al. [36] | Online group | Family and friends | Unaccounted frequency, support provided by family member |
| Isaacson et al. [49] | Online group | Family and friends, other participants | Visit for setup and training and after 4–5 weeks |
| Jarvis et al. [37] | Online group | Family and friends, predefined (facilitator) | 8x 90-min training session (during first 4 weeks), then weekly support visits |
| Jarvis et al. [38] | Online group | Family and friends, other participants | 2x 90-min training session/week over 15 days, then weekly support visits |
| Morton et al. [50] | Online group | Family and friends, other participants, and acquaintances | 3x 90-min training/week (month 1); session every 2 weeks, 1 h remote support alternate weeks (month 2), then 1 month of remote support and no visits |
| Myhre et al. [51] | Online group | Other participants | 3 × 2 h training session for a week |
| Barbosa et al. [52] | One-to-one | Family and friends | 1x individual training session, then weekly visits |
| Pauly et al. [53] | Online group | Family and friends | 2x training sessions before intervention, 3 h customized workshop during intervention |
| Tomasino et al. [54] | Online group | Other participants, predefined (coach) | Remote support throughout the study |
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